drag-and-drop

问题 i´m wondering how can i realize this? I want to have an bigger image in the background and be able to drag and drop a smaller image to the position i want on the bigger image and save it finally, so it becomes one. Is this possible with javascript & html5? appreciate any ideas! thanks 回答1: Yes, when you have your images in position: Create a canvas element the size of the background image Draw your background image into it Iterate through your images and record positions Draw each image by

问题 I have UICollectionView in which I have a prototype cell and UIImageView in it.I am displaying random images in UICollectionView . Now I want to exchange position of UIImageView by swiping it to near cell.I have tried swipe gesture and long press gesture.Code is given below which I have done: - (IBAction)LongPress:(UILongPressGestureRecognizer *)sender { if (sender.state != UIGestureRecognizerStateEnded) { return; } CGPoint p = [sender locationInView:self.collectionView]; NSIndexPath

问题 I'm trying to implement drag/drop support to a propertygrid in C# using VS2005 (.NET 2.0). The propertygrid can handle the dragenter etc. events, but there doesn't seem to be a way to get the griditem under the pointer during a drag event. The best I've been able to get so far is to use the selectedgriditem property to retrieve a custom propertydescriptor and set the value, but this requires a grid item to already be selected before starting the drag/drop operation. Has anyone had any luck

问题 Background Our Eclipse RCP 3.6-based application lets people drag files in for storage/processing. This works fine when the files are dragged from a filesystem, but not when people drag items (messages or attachments) directly from Outlook. This appears to be because Outlook wants to feed our application the files via a FileGroupDescriptorW and FileContents , but SWT only includes a FileTransfer type. (In a FileTransfer , only the file paths are passed, with the assumption that the receiver

问题 How to restrict drag (disable) in the block? Full example <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js" type="text/javascript"></script> <script type="text/javascript"> $(function(){ var x = 0, setElementMove = 0, getElementMove = $('#drag'); getElementMove.mousedown(function(event){ x = event.clientX+$(document.body).position().left-parseInt($(this).css('left')); setElementMove = true; if(typeof event.preventDefault != 'undefined'){ event.preventDefault();

问题 How to make a C# drag and drop (for Prefab) script in Unity? Using Event System or any other way? 回答1: You can use UnityEngine.EventSystems.EventTrigger (EventTrigger component) to catch some events like OnDragStarted, OnDrag, OnDragEnded, etc. Firstly, you need to set this component to object from witch you want to start drag (for example building icon in strategy game). Then set events to some functions, that's implements movement of icon and building placement. Secondly, you need to

问题 I am new to jquery.I am presently developing a website as a part of my project.I am able to drag and drop the products in shopping cart but i am unable to add a remove button to it and also altering the total after removing the item from cart. I tried all possible ways and also saw the duplicates but it dint work for me. I there any way to do so.Plz help me. I will be gratefull to u all. http://jsfiddle.net/Vwu37/3/ HEAD <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

问题 I am using HTML5 drag and drip. During drag & drop (DnD) on Windows 7, I do not see a ghost image when I am dragging an item. It affects all browsers. How do I get it to show? 回答1: You need theme services running. Here is how you do that. Start -> All Progam -> Administrative Tools -> Component Services -> Services (Local) -> Theme (Local) 来源： https://stackoverflow.com/questions/25851579/on-microsoft-windows-when-using-html5-drag-and-drop-i-do-see-the-drag-icon-gh

问题 I'm trying to drag and drop an image from one spot on the canvas to another (should be relatively simple), but can't figure it out. The image which I want to move has the following XAML: <Image Height="28" HorizontalAlignment="Left" Margin="842,332,0,0" Name="cityImage" Stretch="Fill" VerticalAlignment="Top" Width="42" Source="/Settlers;component/Images/city.png" MouseLeftButtonDown="cityImage_MouseLeftButtonDown" MouseMove="cityImage_MouseMove" MouseLeftButtonUp="cityImage_MouseLeftButtonUp"

问题 Is it possible to prevent the Silverlight Toolkit DataGridDragDropTarget from starting a drag-action? What I whant is to use one DataGrid only as DragSource and another one only as DropTarget. And the DropTarget-only-DataGrid should not show this "StartDragShadow" when pressing and moving the mouse over an item. 回答1: Just set the AllowedSourceEffects attribute of the toolkit:DataGridDragDropTarget control to "None" : <toolkit:DataGridDragDropTarget AllowDrop="true" AllowedSourceEffects="None"